Numerical and experimental investigation of a compressor with active self-recirculation casing treatment for a wide operation range


          

刊名：Proceedings of the Institution of Mechanical Engineers
作者：Liangjun Hu（School of Mechanical Engineering, Beijing Institute of Technology）
Harold Sun（Ford Motor Company）
James Yi（Ford Motor Company）
Eric Curtis（Ford Motor Company）
Jizhong Zhang（National Key Laboratory of Diesel Engine Turbocharging Technology）
Ce Yang（School of Mechanical Engineering, Beijing Institute of Technology）
Eric Krivitziky（Concepts NREC, White River Junction）
刊号：780C0002-D
ISSN：0954-4070
出版年：2013
年卷期：2013, vol.227, no.9
页码：1227-1241
总页数：15
分类号：TH22
关键词：Centrifugal compressor；Casing treatment；Wide flow range；Surge margin
参考中译：
语种：eng
文摘：A turbocharger compressor with a wide flow range and a high efficiency is important to the application of advanced clean combustion technologies, such as homogeneous charge compression ignition and low-temperature combustion, in diesel engines. Self-recirculation casing treatment is one of the techniques that can extend the compressor surge margin without much efficiency penalty. The underlying physics of the self-recirculation casing treatment technology were investigated with computational fluid dyamics modeling and bench testing in this study. It is identified that, if the bleed slot of the self-recirculation casing treatment is located upstream of the impeller passage's throat area, self-recirculation casing treatment improves the surge margin but the throat still limits the maximum flow capacity of the compressor. On the other hand, if the bleed slot of the self-recirculation casing treatment is located at the impeller passage's throat area, the self-recirculation casing treatment improves the maximum flow capacity but results in a significant compressor efficiency penalty in the low-flow range. An active self-recirculation casing treatment design was proposed. The active self-recirculation casing treatment design extends the compressor flow capacity and improves the surge margin without an efficiency penalty through dual bleed slots with one upstream and the other downstream of the leading edge of the splitter blades. In the choke condition, the upstream bleed slot will be closed; near the surge condition, the downstream bleed slot will be closed. In the middle flow range, both bleed slots are closed. Both the numerical data and the bench testing results show that the maximum flow rate could be extended by about 15% and the surge margin by about 20% without an efficiency penalty. The mechanism of the performance improvement is also numerically studied.



©2016机械工业出版社（机械工业信息研究院） 京ICP备05055788号-35